2 sentences

1. 他总是四处放火，唯恐天下不乱。

   tā zǒng​shì sì​chù fàng​huǒ, wéi​kǒng tiān​xià bù luàn.

   He is always stirring up trouble, fearing nothing more than peace.

   Source: Dong Chinese Dictionary

2. 有人在旧仓库故意放火，火势蔓延得很快。

   yǒu rén zài jiù cāng​kù gù​yì fàng​huǒ, huǒ​shì màn​yán de hěn kuài.

   Someone intentionally set fire to the old warehouse, and it spread quickly.

   Source: Dong Chinese Dictionary